Invention Grant
US07662044B2 Dual-function skate rail 失效
双功能滑冰导轨

Dual-function skate rail
Abstract:
An improved skate rail having the dual-function of a flat surface and a round surface in one device. The skate rail allows the skateboard rider to easily choose either the flat surface or the round surface. A locking mechanism holds the skate rail securely in either position.
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